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G-Force GFR4000 IR340 Shank

G-Force IR340 diagram

Features:
  • Easy to service
  • Special heat-treated alloy piston for long life, Rockwell hardness 60
  • Minimum loss of performance when injecting foam or water

Item #DescriptionPart #
1Back HeadG4001
2Back Head O-RingG4002
3Choke
4Air Check ValveG4004
5Air Check Valve SpringG4005
6Make-Up Rubber (Buffering)G4006
7Air GuideG4007
8Air DistributorG4008
9Air Distributor O-RingG4009
10CylinderG4010
11Cylinder Stop RingG4011
12Wear SleeveG4012
13PistonG4R4013
14Piston Stop RingG4R4014
15Bit Retaining O-RingG4R4015
16Bit Retaining RingG4R4016
17Chuck (Drive Sub)G4R4017
Choke Plug KitG4029
O-Ring KitG4030

Specifications


Length (w/o drill bit)37.83"
Outside Diameter3.858"
Weight (w/o bit)78.9 lbs.
Cylinder Bore3.229"
Piston O.D.3.224"
Piston Stroke3.74"
Piston Weight20.3 lbs.
Hole Sizes4" - 6"
Air Pressure Consumption100 psi - 350 psi
Wrench SizeA/F 3.15"
ConnectionStd. 2 7/8" API Reg Pin

Air Consumption Chart


PSI150200250300350400
CFM with blank choke240340440540--
with 1/8" choke3755957609251,0601,205
with 1/4" choke4256658451,0951,2701,350

All Hammers come Fitted with blank Choke located in the Air Check Valve




Hammer Service Log


Wear Sleeve / Piston Clearance

PartNew DimensionDiscard Clearance
Wear SleeveA3.228"greater than or equal to 0.010"
Piston ODB3.224"
Wear Sleeve / Piston Clearance diagram

Inner Cylinder / Piston Clearance

PartNew DimensionDiscard Clearance
Cylinder IDC2.756"greater than or equal to 0.010"
Piston ODD2.752"
Inner Cylinder / Piston Clearance diagram

Distributor Probe / Piston ID Clearance

PartNew DimensionDiscard Clearance
Distributor Probe ODF0.978"greater than or equal to 0.010"
Piston IDE0.984"
Distributor Probe / Piston ID Clearance diagram

External Wear

DescriptionWear Limit
Wear Sleeve Discard Dimension3.425"
NOTE: Chuck should be replaced when wear transfers to wear sleeve.


Lubrication

G-Force Series Hammers are precision-made tools and should be treated as such. Only the highest quality lubrication should be used and a constant flow of oil must be maintained at all times. Recommended lubrication amount 1/3 Pint per 100 cfm per hour.

Recommended Grades of Lubricant

ESSO
MATEX
CASTROL
SHELL
MOBILE
AROX EP 150
RDO 302
RD OIL DP 100
AIR TOOL OIL 2 A 320
ALMO NO. 5
Heavy duty oil is recommended for all year-round use, in particular where air supply to the hammer is at high temperature. If lighter grade oil is required due to very low ambient temperatures, amount of oil being used should be increased by 30 percent.

Recommended Pull Down

Minimum @ 100 psi - 500 lbs.Maximum @ 350 psi - 1800 lbs.

Missile Warranty will be voided by the following:


Welding on Wear Sleeve.
Heating Case with a Torch.
Gripping Wrenches across Threads.
Hammering on Casing.

READ WARNING LABEL ATTACHED TO HAMMER.